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• W2102760107 abstract "Abstract A modification of the diketonate method for the determination of the absolute configuration of chiral vicinal diols, first proposed by Nakanishi, is taken under object and tested with a set of aliphatic and aromatic substrates; Yb(fod) 3 (fod = 6,6,7,7,8,8,8‐heptafluoro‐2,2‐dimethyl‐3,5‐octanedionate) is employed as the chromophoric species. The replacement of dpm (dpm = dipivalomethanate) with fod ensures the formation of strong and stable signals in the UV region, whose signs are related to the configuration of the chelating molecule. The choice of ytterbium as the central cation introduces two major advantages: the electronic f–f transition of the rare‐earth supplies a second spectral window in the near‐IR, which is sensitive to the chemical environment around the atom. This allowed us to ascertain the number of different species present in solution and the observation of an induced CD also for strongly UV‐absorbing substrates. The pseudocontact shifts induced in the 1 H‐NMR spectrum by the unpaired electron of the lanthanide ion provide valuable structural information on the adducts. Chirality 14:265–273, 2002. © 2002 Wiley‐Liss, Inc." @default.
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• W2102760107 date "2002-01-01" @default.
• W2102760107 modified "2023-09-30" @default.
• W2102760107 title "Yb(fod)3 in the spectroscopic determination of the configuration of chiral diols: A survey of the lanthanide diketonate method" @default.
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• W2102760107 doi "https://doi.org/10.1002/chir.10030" @default.
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